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Telescope Upgrades

Most telescopes can perform better with one or two targeted upgrades. The trick is knowing which one fixes the problem you actually have. A sagging focuser causes tilted stars, a warm mirror causes boiling planetary views, and an SCT that loses collimation every trip needs better screws, not a new telescope.

This collection includes Starlight Instruments and Baader focuser upgrades, Bob's Knobs collimation screws, Celestron and Farpoint dew shields, cooling fans, Orion Optics UK Dob brakes and focuser stabilisation kits, Pegasus Astro and RB Focus motor kits, and more.

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Original price $49.00 USD
Original price $49.00 USD - Original price $49.00 USD
Original price $49.00 USD
Current price $44.00 USD
$44.00 USD - $44.00 USD
Current price $44.00 USD

ZWO EAF Bracket for Celestron C8/C9.25

Connects a ZWO EAF to Celestron 8" and 9.25" SCT, EdgeHD, and RASA OTAs Enables precise, automated focusing for astrophotography Includes both 5 m...

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Original price $49.00 USD
Original price $49.00 USD - Original price $49.00 USD
Original price $49.00 USD
Current price $44.00 USD
$44.00 USD - $44.00 USD
Current price $44.00 USD
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Original price $35.95 USD - Original price $35.95 USD
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$35.95 USD
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Current price $35.95 USD

Celestron Dew Shield DX for C6 & C8

Prevents dew formation on 6" and 8" Schmidt-Cassegrain, EdgeHD, and RASA (single dovetail) corrector plates Blocks stray light to improve image co...

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Original price $35.95 USD - Original price $35.95 USD
Original price
$35.95 USD
$35.95 USD - $35.95 USD
Current price $35.95 USD
Original price $28.00 USD - Original price $28.00 USD
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$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD

Bob's Knobs Collimation Thumbscrews for C8 EdgeHD - Stainless Steel

The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

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Original price $28.00 USD - Original price $28.00 USD
Original price
$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD
Original price $24.20 USD - Original price $100.10 USD
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$24.20 USD - $100.10 USD
$24.20 USD - $100.10 USD
Current price $24.20 USD

Farpoint Flexible Dew Shield - for Celestron & Meade

Farpoint Dew Shield is a virtually indestructible cover. Simply attach the flexible cover to the front of the optical tube to prevent moisture bu...

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Original price $24.20 USD - Original price $100.10 USD
Original price
$24.20 USD - $100.10 USD
$24.20 USD - $100.10 USD
Current price $24.20 USD
Original price $49.00 USD
Original price $49.00 USD - Original price $49.00 USD
Original price $49.00 USD
Current price $44.00 USD
$44.00 USD - $44.00 USD
Current price $44.00 USD

ZWO EAF Bracket for Celestron C11/C14

Connects a ZWO EAF directly to Celestron C11 and C14 telescopes Bypasses the stock manual focuser for a direct-drive connection Includes flexible ...

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Original price $49.00 USD
Original price $49.00 USD - Original price $49.00 USD
Original price $49.00 USD
Current price $44.00 USD
$44.00 USD - $44.00 USD
Current price $44.00 USD
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Original price $25.00 USD - Original price $25.00 USD
Original price
$25.00 USD
$25.00 USD - $25.00 USD
Current price $25.00 USD

Bob's Knobs Collimation Thumbscrews for C9.25 Fastar - Stainless Steel

The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

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Original price $25.00 USD - Original price $25.00 USD
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$25.00 USD
$25.00 USD - $25.00 USD
Current price $25.00 USD
Original price $524.00 USD - Original price $524.00 USD
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$524.00 USD
$524.00 USD - $524.00 USD
Current price $524.00 USD

Baader Diamond Steeltrack 2" Focuser for Newtonians

2-inch Focuser for Newtonian Telescopes 6 kg Payload Capacity 1:10 Dual-Speed Fine Focusing 40 mm of Precise Focus Travel 55 mm Clear Inner Apertu...

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Original price $524.00 USD - Original price $524.00 USD
Original price
$524.00 USD
$524.00 USD - $524.00 USD
Current price $524.00 USD
Original price $25.00 USD - Original price $25.00 USD
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Current price $25.00 USD

Bob's Knobs for Celestron C6-N/NGT, C8-N/NGT and C10-N/NGT Secondary - 30mm

Part:CNsec30 or CNsec35Fits: Celestron C6-N/NGT, C8-N/NGT, and C10-N/NGT Newtonian telescopes, SkyWatcher (5”, 6”, 8”, 10”, 12”, 14”, 16”) Newtonia...

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Original price $25.00 USD - Original price $25.00 USD
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Current price $25.00 USD
Original price $25.00 USD - Original price $25.00 USD
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Current price $25.00 USD

Bob's Knobs Collimation Thumbscrews for C11 Metric Fastar - Stainless Steel

The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

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Original price $25.00 USD - Original price $25.00 USD
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$25.00 USD
$25.00 USD - $25.00 USD
Current price $25.00 USD
Original price $59.95 USD - Original price $59.95 USD
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$59.95 USD
$59.95 USD - $59.95 USD
Current price $59.95 USD

Celestron Dew Shield DX for C9.25 & C11

Prevents dew formation on 9.25" and 11" Schmidt-Cassegrain, EdgeHD, and RASA corrector plates Blocks stray light to increase image contrast Flexib...

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Original price $59.95 USD - Original price $59.95 USD
Original price
$59.95 USD
$59.95 USD - $59.95 USD
Current price $59.95 USD
Original price $48.40 USD - Original price $52.80 USD
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$48.40 USD - $52.80 USD
$48.40 USD - $52.80 USD
Current price $48.40 USD

Farpoint Knob/Spring Kit - Meade LightBridge

Upgrade standard telescope primary mirror collimation springs and collimation knobs with Farpoint Knob/Spring Kit. These replacement springs are ma...

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Original price $48.40 USD - Original price $52.80 USD
Original price
$48.40 USD - $52.80 USD
$48.40 USD - $52.80 USD
Current price $48.40 USD
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Original price $28.00 USD - Original price $28.00 USD
Original price
$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD

Bob's Knobs for C6 SCT - Stainless Steel

The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

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Original price $28.00 USD - Original price $28.00 USD
Original price
$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD
Original price $28.00 USD - Original price $28.00 USD
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Current price $28.00 USD

Bob's Knobs for C8 SCT - Stainless Steel

Fits: Most Celestron 8” (20 cm) f/10 SCT made in 2005 and later with black Phillips factory collimation screws that have metric threads. Includes S...

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Original price $28.00 USD - Original price $28.00 USD
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Current price $28.00 USD
Original price $25.95 USD - Original price $25.95 USD
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Current price $25.95 USD

Celestron USB Cooling Fan for Dobsonian Telescopes

Cools large Dobsonian primary mirrors to ambient temperature faster Powered by a standard 5V DC USB Type A connection Draws only 0.21A of current ...

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Original price $25.95 USD - Original price $25.95 USD
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Current price $25.95 USD
Original price $280.00 USD - Original price $280.00 USD
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$280.00 USD
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Current price $280.00 USD

Pegasus FocusCube Zero - Celestron SCT, EdgeHD & RASA

Standalone focus motor with integrated controller Zero-backlash bipolar stepper motor design Three versions for Celestron 6/8/9.25, 11 and 14 inch...

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Original price $280.00 USD - Original price $280.00 USD
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$280.00 USD
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Current price $280.00 USD
Original price $537.00 USD - Original price $537.00 USD
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$537.00 USD
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Current price $537.00 USD

Baader Diamond Steeltrack 2" Focuser for Refractors

True diamond micro-geared drive system 6 kg payload capacity without slipping 1:10 dual-speed fine focus mechanism 80 mm of precise focuser travel...

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Original price $537.00 USD - Original price $537.00 USD
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$537.00 USD
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Current price $537.00 USD
Original price $28.00 USD - Original price $28.00 USD
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$28.00 USD
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Current price $28.00 USD

Bob's Knobs for C5 SCT Metric - Stainless Steel

The collimation of an SCT can be a daunting task for a beginner, but it is an absolutely necessary process to get the most out of your telescope! D...

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Original price $28.00 USD - Original price $28.00 USD
Original price
$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD
Original price $28.00 USD - Original price $28.00 USD
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Current price $28.00 USD

Bob's Knobs for SkyWatcher Newtonian Primary with Factory Collimation Screws

Primary collimation Knobs: Black plastic, 16 mm (5/8”) diameter Threads: Stainless steel Primary Lock Knobs: Red plastic, 16 mm (5/8”) diamete...

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Original price $28.00 USD - Original price $28.00 USD
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Current price $28.00 USD
Original price $140.00 USD - Original price $140.00 USD
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$140.00 USD
$140.00 USD - $140.00 USD
Current price $140.00 USD

Pegasus Motor Focus Kit Zero - Celestron SCT, EdgeHD & RASA

Adds automated, zero-backlash focusing to Celestron SCT, EdgeHD, and RASA telescopes Bipolar stepper motor with 1.8° step angle for high-precision...

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Original price $140.00 USD - Original price $140.00 USD
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Current price $140.00 USD
Original price $430.00 USD - Original price $430.00 USD
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$430.00 USD
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Current price $430.00 USD

Starlight Instruments Micro Pinion Assembly Retrofit - fits Takahashi 2.7" Diameter Focusers

Adds 10:1 dual-speed fine focusing to stock Takahashi focusers Directly fits Takahashi 2.7-inch diameter focusers Planetary reduction mechanism pr...

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Original price $430.00 USD - Original price $430.00 USD
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Original price $350.00 USD - Original price $350.00 USD
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$350.00 USD
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Current price $350.00 USD

Starlight Instruments Feather Touch Micro Focuser for Celestron CPC800/RASA 8", NexStar 6SE, C8Edge HD 8SE SCT and Sky-Watcher 150/180mm Mak

Replaces stock single-speed focus knob with a dual-speed mechanism Provides a 10:1 fine-focus ratio for precise adjustments The "CPC" version for ...

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Original price $350.00 USD - Original price $350.00 USD
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Current price $350.00 USD
Original price $30.99 USD - Original price $30.99 USD
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$30.99 USD
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Current price $30.99 USD

SVBONY SV181 Rack and Pinion Newtonian Reflector Focuser - 1.25"

65mm Focuser Travel 105mm Focuser Tube Length Accepts 1.25'' Eyepieces Fits 114mm-150mm Newtonian Reflectors Durable All-Metal Rack & Pinion D...

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Original price $30.99 USD - Original price $30.99 USD
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$30.99 USD
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Current price $30.99 USD
Original price $19.00 USD - Original price $19.00 USD
Original price
$19.00 USD
$19.00 USD - $19.00 USD
Current price $19.00 USD

David Astro Collimation Knobs for Celestron/Sky-Watcher Newtonians

Hand adjustment of collimation Replace stock collimation screws For Celestron and Sky-Watcher Newtonians No screwdriver or hex key needed Descr...

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Original price $19.00 USD - Original price $19.00 USD
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$19.00 USD
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Current price $19.00 USD
Original price $19.00 USD - Original price $19.00 USD
Original price
$19.00 USD
$19.00 USD - $19.00 USD
Current price $19.00 USD

David Astro Collimation Knobs for Celestron C6 SCT

Hand adjustment of the C6 secondary mirror Replace the stock collimation screws No screwdriver or hex key needed Adjust while at the eyepiece D...

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Original price $19.00 USD - Original price $19.00 USD
Original price
$19.00 USD
$19.00 USD - $19.00 USD
Current price $19.00 USD
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Match the Upgrade to the Problem

  • Image shifts or slips when focusing: A dual-speed focuser or a motor focus kit.
  • Collimation needs tools: Bob's Knobs thumbscrews replace factory screws on SCTs and Newtonian primaries.
  • Dew on the corrector or lens: A dew shield first, then a heater and controller.
  • Boiling views after setup: A cooling fan helps Newtonian and Dobsonian mirrors reach outside temperature faster.
  • Tube moves on its own: A Dobsonian brake or better altitude bearing tension.

Telescope Upgrades: Frequently Asked Questions

What is the most useful first upgrade?

It depends on the telescope. For SCTs, a dew shield and collimation knobs. For Dobsonians, a cooling fan and a good finder. For refractors used for imaging, a stronger focuser.

Will an upgrade void my warranty?

Bolt-on upgrades generally do not. Modifying optics or drilling the tube can. Ask us if you are unsure.

Not sure which upgrade will help?

Describe what is bothering you about your telescope. We will name the upgrade that fixes it, or tell you if none is needed.